Cycles Rendering Issue
I have received your scene and have found the problems. There are some issues with your scene. I will send you the modified files via mail.
Here is a first screenshot for the audience with the solutions for your problem.


You are not using any dilation in your images. (This is not a real problem, but would be better). Dilations can be done with tools like xNormal.
Your normal map is strange and produce extreme curved borders. Together with the dilation problem it produces the main issues to your result. I guess you used a filter to produce your maps like normals, depth etc. This is not really a good way. You should use a better filter for such things or better color templates.
Your mesh need some editing. You are using "custom splits normals data" in your mesh. Remove this data and smooth the mesh. Add an own smoothing value to the mesh then. For example a smoothing of 20 degrees. This makes nice architectual shapes and helps to remove the smooth edges too.